Update emscripten Dockerfile to 3.1.19

scripts/ci/build_emscripten.sh

@@ -40,7 +40,8 @@ else
 	BUILD_DIR="$1"
 fi
 
-apt-get update && apt-get install lz4
+apt-get update
+apt-get install lz4 --no-install-recommends
 
 WORKSPACE=/root/project
 
@@ -61,12 +62,20 @@ then
 	echo -n "$CIRCLE_SHA1" >commit_hash.txt
 fi
 
+# Disable warnings for unqualified "move()" calls, introduced and enabled by
+# default in clang-16 which is what the emscripten docker image uses.
+# Additionally, disable the warning for unknown warnings here, as this script is
+# also used with earlier clang versions.
+CMAKE_CXX_FLAGS="-Wno-unqualified-std-cast-call -Wno-unknown-warning-option"
+
+
 mkdir -p "$BUILD_DIR"
 cd "$BUILD_DIR"
 emcmake cmake \
 	-DCMAKE_BUILD_TYPE=Release \
 	-DBoost_USE_STATIC_LIBS=1 \
 	-DBoost_USE_STATIC_RUNTIME=1 \
+	-DCMAKE_CXX_FLAGS="${CMAKE_CXX_FLAGS}" \
 	-DTESTS=0 \
   ..
 make soljson